Grinding and polishing machine



(No Model.)

J. L. TAPLIN.

GRINDING AND POLISHING MACHINE. No, 252,063. Patented Jan. 10,1882.

Witnesses: Ina/ado)":

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UNITED STATES PATENT OrricE.

JOHN L. TAPLIN, or AKRON, OHIO.

GRINDING AND POLISHING MACHINE SPECIFICATION forming part of Letters Patent No. 252,063, dated January 10, 1862.

' Application filed September 12, 1881. (No model.)

,Toall whom it may concern:

Be it known that I, JOHN L. TAPLIN, of Akron, in the county of Summit and State of Ohio, have invented a new and useful Improvement in Grinding and Polishing Machines, of

which the following is a specification.

My invention has special reference to that class of machines used for grinding and polishing stove-plates. The ground and polished faces ofthese plates are al most in variably beve ed.

The object of my invention is to providea machine which shall grind and polish at any desired angle with wheels of even diameter throughout, and which shall avoid channeling or grooving the wheels. I accomplish this by devices shown in the accompanying drawing, which is a side elevation of a grinding and polishing machine embodying my invention. i

Upon a suitable frame, A, is placed a We, B, pivoted upon the bolt 0, so that it may be tilted by the screw D and hand-nut D, and held in any position by the link E and handnut E.

The grinding or polishing wheel G is a cylinder of even diameter throughout, mounted upon ashaft, F, which is inclined toward the front ofthe machine at an angle less than a right angle with the table B, and this should preferably be the mean angles of the surfaces to be ground. This shaft F is journaled in the frame or sash I, and is turned by a belt on the long pulley'H. The sash or frame I slides in the guides J J,.and is reciprocated by the compound pitman R Q, crank O, and worm-wheel K. The wheel K is turned by the worm L on the shaft M, on which are the fast and loose pulleys N N. By thus placing the grinding'or polishing wheel G at an angle with the table B the same effect is obtained as from a conical wheel, while anyother angle is readily provided for by tipping the table B.

By imparting to the wheel G a reciprocating mot-ion in the line of its axis new surfaces are continually presented to the object to be ground, thereby preventing grooving of the wheel and wearing it evenly.

The distance that the wheel G shall rise above the table B is regulated by a compound pitinan consisting of the screw R entering the threaded sleeve Q, these parts being operated by the hand-wheels R and Q, respectively,

and whereby the length of the pitinau can be increased or diminished. The wrist-pin of the compound pitman is adjustable in a groovein the crank I toward or from the center ot'.wheel K, said wristpin being confined in its adjusted positions by means of the set-screw P. This compound adjustment of the pitman with reference to its length, and toward or from the center of the wheel K, efiects advantages which I will now specifically set forth.

By adjusting the length of the pitman the height or projection of the grinding-cylinder above the face of the work-table can be regulated and varied with precision, which is of advantage where metal plates of different thicknesses are to be ground or polished-that is, ifa thin plate is to be acted on the pitman is adjusted to draw down the cylinder, so that it will not project so far above the table as is essential when a thick plate is to be operated on.

By means of the pitman being adjustable on the crank 0 toward or from the center of the wheel K the length or extent of stroke of the grinding-cylinder can be varied, which is of advantage in that it permits long or short grinding-cylinders to be employed. Thus if a short grinding-cylinder is employed, which is best for thin metal plates, the length or extent of the stroke of the grinding-cylinder can be restricted by adjusting the wrist-pin of the pitman on the crank 0 toward the center of the wheel K, while it a longer cylinder is employed, which is best for thick metal. plates, the length or extent; of its stroke can be increased by adjusting the wrist-pin of the pitman away from the center of the wheel K.

This construction and combination of devices produces a very efficient machine, well adapted for work on thick or thin metal plates, and renders it possible to vary the length of the grindingylinder according to the work to be performed. 7 V

I am aware that grinding and polishing machines have been provided with tilting tables pivoted at or near their center and capable of adjustment; also, thatsuch machines have been provided with vertical grinding-cylinders com bined with mechanism for revolving and 1e ciprocating the same; also, with grindingcylinders capable of adjustment from a vertical to an inclined position combined with a hinged table; but such features are not broadly claimed by me, and are hereby disclaimcd.

What I claim is-- y In a grinding and polishing machine, the combination of the following elements, to wit: a frame, A, a tilting table, B, pivoted near or at its center thereon, devices for tilting and clamping the table in position, an inclined shaft, F, carrying the pulley H, and an inclined grinding-cylinder G, a sash or frame, I, carrying the cylinder-shaft, the inclined guides JOHN L. TAPLIN.

Witnesses O. P. HUMPHERY,

E. W. STUART. 

